Impeller not turning in pump...

[jtelep]

Hi all,

So i got a new reman impeller from SBT and had it torqued to the standard 52 ft lbs today and now it's so tight it won't even turn in the pump. I reinstalled the pump anyway hoping the engine could do it but to no avail. I took the spark plugs out and sprayes the wear ring with some wd40 and managed to get it to turn somewhat but when i put the plugs back in try to start it it just won't. This is a new wear ring and reman impeller so i am lost. Anyone have any ideas as to how i can get the ring worn enough to allow the impeller to turn?

Thanks.

 

[KCB 850]

Is there clearance between the impeller and the ring? I am willing to bet there is.

If so, then you have jammed the impeller shaft. Don't sweat it. It is a common occurrence to first timers, I should know it happened to me. You will need to disassemble the pump to free the shaft. While you have it apart check the thrust washer and thrust bearing to make sure they are not damaged. When you re-assemble the pump make sure the shaft spins prior to torquing the impeller. after torquing the impeller make sure it spins freely.

Robert

 

[Strizzo]

you probably got the thrust bearing or washer off its location on the shaft. you can make sure that you aren't jamming it up by rotating the pump housing while the shaft is clamped in a bench vise as you're tightening the impeller down. also don't forget loctite on the threads and grease on the splines before you put the pump back in.

 

[Tsef]

Or you have the exact same problem I just had yesterday while installing new Solas impeller. Thehubof mynew prop bottomed out on the the hub of the bronze pumphousing. I rebuilt it four times trying to see if anything was binding till I realized it was bottoming out. Send back the impeller or grind the impEller housing where the pump makes contact withthe impeller hub. I had to use a dremel and made a few passes around the housing hub to take alittle of the metal away which made impeller spin freely. It's a floating shaft assembly with very little clearance so a prop with a slightly longer hub will rub.

 

[Dr Honda]

Tsef: Never heard of the impeller hubs rubbing. I guess it could happen. BUT... as long as it spinning free, it shouldn't make a big deal.

You didn't take any pictures by any chance?

Jtelep: As they other's were saying... you probably pinched the thrust washer.

 

[Tsef]

I had to replace my pump because of bearing failure and replaced it with a bronze pump off another gsxl 99 mine was a plastic pump. I haveno idea why it was rubbing but it was. It is the correct pump and impeller is Solas st-cd15/20 which is what it calls for. So I assumed if it was rubbing just clean up where it's rubbing.

 

[jtelep]

I don't think it has anything to do with the inner workings of the pump short of the fact that the new impeller is just a hair too big for the wear ring. The last reman impeller I got from SBT was a hair too small and even when torqued to the right spec would spin freely inside the pump

 

[jtelep]

No, well only on one side. It's rubbing against the ring on the leading edge of two of the three impeller blades. It was beginning to get difficult to turn when I just hand tightened it on the shaft but now that I've torqued it to the stock 52 lb/f spec of the machine it won't turn at all unless like I said I take the plugs out and use the starter. My question is if the impeller is just a hair too big can you shave down the inside of the wear ring with it so that it will spin freely or am I going to have to take the impeller out again and then somehow get the wear ring "worn" down enough so that the impeller will spin freely? I installed one from SBT a few weeks ago that was just a little bit too small for the inside of the ring even though it was supposed to and torqued it down and it spun freely inside the pump with the exact same amount of torque as this one but it was causing the boat to cavitate like crazy. Has anyone had this problem before where the new impeller is just a bit larger than the ring and as a result wouldn't freely spin? What can be done to correct this?

 

[manolocross]

You need to use seadoo oem wearing ... Is the sbt wearing all white ??

 

[jtelep]

No the wear ring was installed by a shop but it was black. How do you know (once the ring has been installed) whether or not it's an OEM part or not. I've got one that I bought from another place and it looks similar (all black) but no markings on it one way or the other that tells me it's an OEM part...